Question

qual resultado?

{x+2y=5
{2x+y= -2


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Answer 1

Resposta:

x= 5 -2y

2(-2y+5)= -2

-4y +10= -2

-4y= -12 (-1)

4y= 12

y = 12÷4

y = 3

× + (2×3 )= 5

X + 6=5

x = 5 -6

x = -1